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Origins of water, atmosphere, life

Origins of water, atmosphere, life. outline. Age of the earth The Hadean Oldest rocks & water Early atmosphere & earliest fossils Oxygenated atmosphere and life. PHANEROZOIC. Ray Troll. PRE- CAMBRIAN. PRE- CAMBRIAN. SODA!. Phanero. 0.5. Proterozoic. 2.5. Archean. 4. Hadean.

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Origins of water, atmosphere, life

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  1. Origins of water, atmosphere, life

  2. outline • Age of the earth • The Hadean • Oldest rocks & water • Early atmosphere & earliest fossils • Oxygenated atmosphere and life

  3. PHANEROZOIC Ray Troll

  4. PRE- CAMBRIAN

  5. PRE- CAMBRIAN

  6. SODA!

  7. Phanero 0.5 Proterozoic 2.5 Archean 4 Hadean

  8. Hadean Phanero 0.5 Proterozoic 2.5 Archean 4 Hadean

  9. Hadean Phanero 0.5 Proterozoic 2.5 Archean 4 Hadean

  10. Hadean Phanero 0.5 Proterozoic 2.5 Archean 4 Hadean

  11. The Essential Elements

  12. Phanero 0.5 • Oldest rocks ~4byo • Mineral evidence from oceans: 4byo • Hydrothermal activity • No mountains • Very little “land” • LOTS of volcanoes Proterozoic 2.5 Archean 4 Hadean

  13. Phanero 0.5 • Oldest rocks ~4byo • Mineral evidence from oceans: 4byo • Hydrothermal activity • No mountains • Very little “land” • LOTS of volcanoes Proterozoic 2.5 Archean 4 Hadean

  14. Prokaryotes (and Archaea) Phanero 0.5 Proterozoic 2.5 Archean 4 Hadean

  15. Entophysalis Phanero 0.5 Proterozoic 2.5 Archean 4 Hadean

  16. Phanero 0.5 Proterozoic 2.5 Archean 4 Hadean

  17. We love carbon dioxide! Phanero 0.5 Proterozoic 2.5 Archean 4 Hadean

  18. How do we know?

  19. Phanero 0.5 Proterozoic 2.5 Archean 4 Hadean

  20. Phanero 0.5 Proterozoic 2.5 Archean 4 Hadean

  21. Phanero 0.5 Proterozoic 2.5 Archean 4 Hadean

  22. Summary • Oceans formed early • Early atmosphere was toxic (to us…) • Early life photosynthesized and poisoned the atmosphere

  23. 4 2.5 0.5

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